TY - GEN
T1 - Low-directivity quasi-monochromatic thermal radiation from microcavities covered by thin metal film
AU - Kohiyama, Asaka
AU - Shimizu, Makoto
AU - Iguchi, Fumitada
AU - Yugami, Hiroo
N1 - Publisher Copyright:
© 2016 by ASME.
PY - 2016
Y1 - 2016
N2 - Here, closed-end microcavity is proposed in which a semi-transparent metal film was formed atop microcavity. The structure shows weak angular dependence as well as quasimonochromatic absorptance. Au is employed as material of the cavity walls and the covering thin film. Quasi-monochromatic absorption from the structure is observed in numerical simulation. High quality factor (Q factor) is obtained by strong confinement in the closed-end microcavity. Asymmetric and quasi-monochromatic absorption band with a Q factor of ∼28 at 1.85 μm was observed. This value was about 4-fold larger than that of the open-end microcavity. Additionally, the closed-end microcavity structure filled with SiO2 in cavity exhibits isotropic and quasi-monochromatic thermal radiation over a wide solid angle. This result suggests that both quasimonochromatic and low-directivity absorptance can be realized by using this configuration.
AB - Here, closed-end microcavity is proposed in which a semi-transparent metal film was formed atop microcavity. The structure shows weak angular dependence as well as quasimonochromatic absorptance. Au is employed as material of the cavity walls and the covering thin film. Quasi-monochromatic absorption from the structure is observed in numerical simulation. High quality factor (Q factor) is obtained by strong confinement in the closed-end microcavity. Asymmetric and quasi-monochromatic absorption band with a Q factor of ∼28 at 1.85 μm was observed. This value was about 4-fold larger than that of the open-end microcavity. Additionally, the closed-end microcavity structure filled with SiO2 in cavity exhibits isotropic and quasi-monochromatic thermal radiation over a wide solid angle. This result suggests that both quasimonochromatic and low-directivity absorptance can be realized by using this configuration.
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U2 - 10.1115/MNHMT2016-6683
DO - 10.1115/MNHMT2016-6683
M3 - Conference contribution
AN - SCOPUS:84968718659
T3 - ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016
BT - Micro/Nanofluidics and Lab-on-a-Chip; Nanofluids; Micro/Nanoscale Interfacial Transport Phenomena; Micro/Nanoscale Boiling and Condensation Heat Transfer; Micro/Nanoscale Thermal Radiation; Micro/Nanoscale Energy Devices and Systems
PB - American Society of Mechanical Engineers
T2 - ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016
Y2 - 4 January 2016 through 6 January 2016
ER -